(b) Assume that relation PROJ is fragmented as PROJ1 = OPNOS"P2" (PROJ) PROJ2 = «PNO>"P2" (PROJ) Furthermore, relation ASG is indirectly fragmented as ASG1 = ASG PNO PROJ1 ASG2 = ASG PNO PROJ2 and relation EMP is fragmented as EMP1 = EMP ENO ASG1 EMP2 = EMP ENO ASG2 Now, Transform the following query into a reduced query on fragments: SELECT ENAME FROM EMP, ASG, PROJ WHERE PROJ.PNO = ASG.PNO AND EMP.ENO = ASG.ENO AND PNAME= "Database Develop."

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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|(b) Assume that relation PROJ is fragmented as
PROJ1 = GPNOS"P2" (PROJ)
PROJ2 = GPNO>"P2" (PROJ)
Furthermore, relation ASG is indirectly fragmented as
ASG1 = ASG PNO PROJ1
ASG2 = ASG PNO PROJ2
and relation EMP is fragmented as
ΕMP1EP ENΟ ASG1
EMP2 = EMP ENO ASG2
Now, Transform the following query into a reduced query on fragments:
SELECT ENAME
FROM EMP, ASG, PROJ
WHERE PROJ.PNO = ASG.PNO
AND EMP.ENO = ASG.ENO
AND PNAME= "Database Develop."
Transcribed Image Text:|(b) Assume that relation PROJ is fragmented as PROJ1 = GPNOS"P2" (PROJ) PROJ2 = GPNO>"P2" (PROJ) Furthermore, relation ASG is indirectly fragmented as ASG1 = ASG PNO PROJ1 ASG2 = ASG PNO PROJ2 and relation EMP is fragmented as ΕMP1EP ENΟ ASG1 EMP2 = EMP ENO ASG2 Now, Transform the following query into a reduced query on fragments: SELECT ENAME FROM EMP, ASG, PROJ WHERE PROJ.PNO = ASG.PNO AND EMP.ENO = ASG.ENO AND PNAME= "Database Develop."
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